9. After binding to an antigen, T cells activate and differentiate into one of three cell types. Name each and describe briefly what they do.

1. "Which of the following statements is/are true? The only region in the body where a virus‐infected cell can interact with T cells is in the lymph nodes.Virion surface proteins tend to elicit a stronger immune response during the course of natural infection than do internal components of the virion.Epitope‐containing antigens must be digested to single amino acids and reassembled at the surface in the presence of histocompatibility antigens in order to provoke immunity. 2. Why are soluble antibodies (the products of the humoral response) good antiviral agents? 3. What are the roles of the following cells in the vertebrate immune response? B cellsHelper T cells (CD4+)Cytotoxic T cells (CD8+)"

1. Explain the difference between Innate and Adaptive Immunity?

10. What specific kinds of host cells do helper T cells respond to?

5. Results from complement activation and the functions of key components. Mechanisms. (A). Lysis - breaking holes through membrane (B). Induce inflammation (anaphylatoxin) (C). Opsonization Opsonins (D). Augment adaptive response (E). Clearance of soluble immune complexes (Ag/Ab) and apoptotic cells.

1. Under what circumstances is having a fever beneficial? Under what is having a fever circumstances harmful? 2. What are the actions of T cells? What are the actions of B cells?